Diestock



I. w. NONNEMAN.

DIESTOCK.

APPLICATION FILED FEB. 9, 1920.

Patented Dec. 6, 1921;

3 SHEETS-SHEET 5y ATTURNEYF l. W. NONNEMAN.

DIE STOCK.

APPLICATION FILED FEB. 9, I920.

Patented D06. 6, 1921.

' 3 SHEETS-SHEET 2..

. [/WE/VTUR.

fiY ATTUR/VEXS I. W. NONNEMANJ DIESTOCK.

APPLICATION HLED FEB. 9. I920.

Patented "D60. 6, 1921.

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ATTUR/VE Y5 UNITED STATES PATENT OFFICE.

IRA W. NONNEMAN, OF WARREN, OHIO, ASSIGNOR TO THE BORDEN COMPANY, OFWARREN, OHIO, A CORPORATION OF OHIO.

DIESTOCK.

Specification of Letters Patent.

' Patented Dec. 6, 1921.

To all whomit may concern:

Be it known that I, Ina TV. NONNEMAN, a citizen of the United States,residing at Warren, in the county of Tumbrill and State of Ohio, haveinvented a certain new and useful Improvement in Diestocks, of which thefollowing is a full, clear, and eX- act description, reference being hadto the accompanying drawings.

The general object of this invention is to provide a simple andeffective threading tool capable of forming threads of different pitcheson pipes, bolts and the like of various sizes.

My invention comprises the arrangement of a plurality of sets of chasersso carried in a single die stock that one set may be moved to operativeposition in which it may be adjusted for sizes while the other set ofchasers is held receded and in an inactive or idle position.

Another object of the invention is to provide practical means to causemovement of all of the chasers of one set simultaneously from active toidle position and at the same time move the other set from idle toactive position.

Still another object is to provide a satisfactory and convenientlyoperable locking device for holding the chasers in any position giventhem.

My invention is hereinafter more fully explained in connection with theaccompanying drawings. The essential characteristics are summarized inthe claims.

In the drawings Figure 1 is a side elevation of my die stock; Fig. 2 isan axial section through the same; Fig. 3 is a face or front view of thedie stock; Fig. at is a similar view with the front plates removedshowing a means for actuating the sets of chasers alternately; Fig. 5 isa rear view of the die stock illustrating the adjustable guide; Fig. 6is a detail of the cam plate for causing radial movement of the chasers;7 is a diametric section through the same; Fig. 8 is a detail of one ofthe chasers removed; Fig. 9 is a detail of one of the rocking levers,for causing alternative movement of the chasers; Fig. 10 is a detail ofthe cam plate for adjusting the guiding jawsf The frame comprisessubstantially alined inner sleeves 1 and 2 integral with a web 3 fromwhich project flanges 4 and 5. Di..-

metrically opposite sockets 6 are employed for receiving the usual diestock handle 7.

The chasers of one set. are designated 10 while chasers of the other setare designated 12. t will be noted that the chasers are arranged inpairs and that one of each set in each pair of chasers is slidable withrelation to the contiguous chasers. Each pair is slidably mounted in aradial slot, or opening, formed in the frame and extending through thesleeve 2 and flange 5.

The chasers of one of the sets are adapt ed to be moved by a cam plate.For example, the chasers l0 carry outwardly projecting pins or lugs 15slidably engaging slots 16 in a revoluble plate-like ring 20, embracingthe sleeve 2 and held in position by a nut 22 having wing projections'23for convenience of rotating the nut by hand. This nut is shown asthreaded to the sleeve 2 outside the plate 20. The periphery of the camplate 20 is knurled whereby it may be conveniently rotated and, as willbe seen from Fig. 6, such rotation causes radial movement of the chasers10.

In order to obtain compactness and avoid confusion of cam slots, such aswould be necessary in case another set of cam grooves were arranged forthe chasers 12, I have provided a unique method of connecting thechasers of the two sets so that as the chasers 10 are moved the chasers12 are correspondingly moved in an opposite direction. This meanscomprises rocking levers 30 having humps 31 and 32 rounded and abuttingthe flanges 5 and 2, respectively,, while at the ends of the levers arerounded knobs 33 and 3a which engage semi-cylindrical notches in thechasers as illustrated at 33 in Fig. 8; thus as the chasers 10 movesoutwardly it moves the corresponding arm of the lever 30 outwardly, thelever itself pivoting and sliding between the two flanges and causingthe knob 34 and chaser 12 to move inwardly radially a correspondingdistance. The notches in the chasers l0 and 12 are so arranged thatoneset of chasers may be in active position while the other is in idleposition. Adjustment may be accomplished for different sizes by movingone set of chasers a comparatively short distance radially by rotatingthe plate 20 without bringing the other set of chasers into a positionin which they might interfere.

As a convenient means for guiding the die sleeve 1 and adapted to beclamped against the end of flange {l by a nut 50, threaded to the sleeve1 and having suitable gripping wings 52. It will be seen that byrotating this cam plate 45 the jaws may be moved radially to embrace thepipe or other article being threaded, and may be securely locked in suchposition by tightening the nut 50.

Having thus described my invention what I claim is: y

1. The combination with a chaser carry ing frame, a plurality of sets ofradially movable chasers, a series of cams for actuating one set ofchasers radially, and lever connections between each chaser of one setwith a chaser of the other set, whereby iiiward movement of one set ofchasers causes outward movement of the other set of chasers.

2. The combination with a chaser carrying frame, a plurality of sets ofradially mow able chasers, means for actuating one of said. chasersradially, and means whereby inward movement of one set of chasers causesoutward movement of the other set of chasers,

3. The combination with a chaser carrying frame, a plurality of sets ofradially movable chasers, means for actuating one set of chasersradially, and means connecting each chaser of one set with a chaser ofthe other set, whereby inward movement of one set of chasers causesoutward movement of the other set of chasers. a

4:. The combination of chaser carrying frame, a plurality of sets ofradially movable chasers, means for simultaneously actuating one set ofchasers radially, and a lever connection between each chaser of one setwith a chaser of the other set, whereby inward movement of one set ofchasers causes outward movement of the other set of chasers.

5. In a die stock, the combination of a chaser carrier, a cam platerotatably mounted thereon, two sets of chasers radially movable in saidcarrier, one set having means engaging cam surfaces on said cam plate,rocking levers between each chaser of one set and a chaser of the otherset and cooperating therewith, whereby movement of the chasers of oneset, by the actuation of the cam plate, may move the chasers of theother set in an opposite direction.

6.,In a die stock, the combination of a chaser carrying frame, two setsof chasers radially movable in said frame, means for moving all of thechasers in one set either inwardly or outwardly, a rocking lever betweeneach chaser of one set and a chaser of the other set and engagingtherewith, each lever being adapted to cause the chasers engaged by itto be moved in opposite directions.

7. In a die stock, the combination of a chaser carrying frame, two setsof chasers radially movable in said frame and arranged in pairscomprising a chaser of each set, means for moving all of the chasers inone set, either inwardly or outwardly, a rocking lever between eachchaserof one set and a chaser of the other set and engaging therewith,each lever being adapted to cause the chasers engaged by it to be movedin opposite directions. 7

8. In a die stock the combination with a chaser carrying frame of twosets of chasers radially movable therein, two concentric shoulders onsaid frame, and a rocking lever pivotally engaging at one end a chaserof one set, and at the other end a chaser of the other set, and havingrounded shoulders engaging said concentric shoulders.

9. The combination with a chaser carrying frame, of a plurality of setsof radially movable chasers, means for moving the chasers of one setradially simultaneously in the same direction, a lever connecting eachchaser of one set with a chaser of the other set, the arms of the leverhaving pivotal engagement with each chaser engaged thereby, an outwardlyprojecting rounded shoulder on each lever forming its pivot, and ashoulder on said frame on which said pivot shoulder may rock and slide.

10. The combination with a chaser carrying frame having concentricshoulders, openings therethrough forming guide-ways for two sets ofchasers arranged in pairs, each pair comprising a chaser of each set, acam plate rotatable concentrically of said shoulders and havingeccentric cam slots, projections on each chaser of one set engagingsaidslots, means for locking said rotatable cam plate in any positiongiven it, and a lever connection between the chasers moved directlybysaid plate and the chasers of the other set for moving said lastmentioned chasers in the opposite direction 11. The combination with achaser carrying frame, of a plurality of sets of radially movablechasers, concentric shoulders having radial openings slidably receivinga chaser of each set, a revoluble plate having eccentric cams acting onthe chasers of one set, lever members each pivotally engaging a chaserof each set and having intermediate pivot shoulders extending bothinwardly and outwardly, and concentric shoulders spaced apart andslid-ably engaged by said pivot shoulders.

I In testimony whereof, I hereunto aiiix my signature.

IRA w. NONNEMAN.

